دراسة التلوث البكتيري وبعض الصفات الفيزيائية والكيميائية لمعامل مختارة لأنتاج المياه المعبأة في محافظة كربلاء -العراق

Study of bacterial pollution and some physical chemical properties for selected factories to produces botteld water in Kerbala-Iraq

Abstract

This study was conducted in the holy city of Karbala to investigate the microbial community and physicochemical properties of liquefied water, after treatment by reverse osmosis and filling it, and to show the effect of storage on the properties of that water. Bacterial examinations were performed by several methods, including pour plate method, and most probable number. The numbers ranged between (0.03*102-12*102 CFU /1 ml) and (0-23 MPN / 100 ml) for the total number of aerobic and total coliform bacteria respectively, and (0- 16 MPN/100 ml) for the total number of both fecal coliform and Escherichia coli. Both streptococcus faecalis and Pseudomonas aeruginosa were not found in the tap water. In bottled water, the numbers ranged between ( 5.2 * 101 – 0CFU/1 ml) for the total number of aerobic bacteria and between (3.6-5.1 MPN / 100 ml) for each of the total coliform, fecal coliform, E. coli, and the numbers of Pseudomonas aeruginosa ranged between (3.6-5.1 MPN / 100 ml). and no presence of fecal streptococcus bacteria was recorded in the bottled water.
The results of physical and chemical examinations were recorded, which included temperature, pH, electrical conductivity, dissolved solid salts, total hardness, calcium, magnesium, chlorides, sulfates, sodium, potassium and nitrates, and ranged between (33.4 _ 15.7°C), (8.2_7), (891_1201micro siemens), (580_730), (381.5_278.4), (114.5_62.1), (48.7_12.3), (134.25_79.18), (150.3_57.3), (81_49), (4.8_2.1), (2.28_1.07) mg/L for tap water, respectively. As for bottled water, it ranged between (33 _ 15.2 °C), (7-5), (242-14.9 micro siemens), (158.2_10), (75.7_3.93), (40.9_0.8), (14.9_0. 3) , (52.3_1.1), (30.4_0.19), (25.6_1.4), (3.9_0), (1.2_0) mg/L, respectively.
The physical and chemical results of tap water and bottled water were all within the Iraqi standard and that of the World Health Organization and did not exceed the permissible limits except for the pH. Low results were recorded throughout the study period. As for the results of bacterial tests, they recorded the presence of high bacterial contamination for a number of tap water, as well as the presence of
B
Escherichia coli. And the Pseudomonas aeruginosa of a number of bottled water types.